I haven’t seen the drywall mount8ng frames over here so mostly the camera is mounted directly onto the drywall using the same anchors as in your video. Allghough i prefer the me5al anchors instead of plastic ones, the plastic ones break to fast when screwing the in.
if i need more space behind the camera, we’ll use standard drywall boxes such as these
As you can see, compared to the metal octagonal ones that you show in the videos these are plastic. More imortan5ly, they’re round and so the whole is easier and faster to make than for an octagonal or rectangular one
instead of the lightweight furring strips we also use 20mm thick MDF above the ceiling tile. If you make it fit just in between the T shaped profiles then you can screw it to the T profiles if you lift the adjacent tiles. Disadvantage being that you can’t lift the tile with the camera anymore